Merge pull request #4178 from martin-frbg/llvm17

Add (gmake) support for LLVM17's new flang

Makefile.system

@@ -1087,8 +1087,9 @@ endif
 endif
 endif
 
-ifeq ($(F_COMPILER), GFORTRAN)
+ifeq ($(F_COMPILER), $(filter $(F_COMPILER),GFORTRAN FLANGNEW))
 CCOMMON_OPT += -DF_INTERFACE_GFORT
+ifeq ($(F_COMPILER), GFORTRAN)
 FCOMMON_OPT += -Wall
 # make single-threaded LAPACK calls thread-safe #1847
 FCOMMON_OPT += -frecursive
@@ -1102,6 +1103,7 @@ EXTRALIB += -lgfortran
 endif
 endif
 endif
+endif
 ifdef NO_BINARY_MODE
 ifeq ($(ARCH), $(filter $(ARCH),mips64))
 ifdef BINARY64

f_check

@@ -101,7 +101,14 @@ else
                         *flang*)
                             vendor=FLANG
                             openmp='-fopenmp'
-                            ;;
+			    data=`$compiler -v 2>&1 > /dev/null `
+                	    v="${data#*version *}"
+                	    v="${v%%*.}"
+                	    major="${v%%.*}"
+                	    if [ "$major" -ge 17 ]; then
+                        	vendor=FLANGNEW
+			    fi	
+			;;
                         *ifort*|*ifx*)
                             vendor=INTEL
                             openmp='-fopenmp'